Buy some on-contact wasp killer. That should do the trick.

It sounds like you really have an irrational fear of wasps. Generally, wasps won't hurt you unless you bother their nest. But that is not your question.

I have found that in spraying a nest, you must also knock it down. You have probably killed half the adult wasps and maybe many or all of the babies in the nest. I have seen them rebuild after spraying if the nest is left intact and there are survivors. Try again tomorrow, maybe at night because I don't think they will fly when they can't see. If you shoot them very early in the morning, that works too, especially after a cool night. They are cold blooded and take some time to get going in the morning. Shoot the nest and any wasps you see, knock the nest down with a broom or stick and step on the nest (if it is not too huge). Once the nest is gone, any survivors will look elsewhere and build elsewhere.

By the way, wasps are territorial and will not let another nest be built too close to theirs.

Jerry

The directions need also to include "RUN"
What I generally do is aim from far... away with a water hose,shoot and run as fast as I can considering that I use
a cane to help my walk. I usually come back in a few hours to make sure that the job is done or I need to do it again.
You also may want to just communicate with your neighbor.
Letting her know of the danger to her and to you. This way
there's no problem with trespassing.
OK. I confess,I did laugh.
Felix

This just came to my head. Knock them out with smoke first, like when many people do when they harvest honey with bees.

No trespassing issues to worry about...I sprayed from my yard. Our houses are very close in proximity so that's why I was concerned.

I don't panic if a wasp flies 'near' but a huge wasp nest does freak me out!

saintpfla, you're not alone. Back in the 50's I chose to "hide" next to my neighbor's fence. I was wearing a scarf, (or babuscha as we called them) and I remember looking down and seeing wasps crawling up the ties under my chin. I screamed and ran to "seek" mommy.I had about 7-10 stings.
I hate wasps.
I hate hide and seek.

Cofeemom - I know EXACTLY how you feel!!!!

They latch on to you and you cannot knock them off once they decide to bite you and they chase you when you run.

I had 25 stings...it was summer in the 70s - shorts and t-shirt time - and before Benadryll was invented. Meat-tenderizer does nothing - fyi.

I hate wasps too.

We had a nest in a pear tree once about 10 years ago that grew to the size of a basketball. It housed hundreds of wasps. We had to call Florida Pest Control and he brought a big truck with a high pressure hose, parked ACROSS THE STREET, and shot it for about 15-20 min with a big stream of insecticide. It took that long to knock it down and saturate it to the point where they were dead.

I would spray at night when they are all home to roost so to speak, but generally once you kill most wasps they don't seem to rebuild and since they are territorial I leave the nest there so other wasps won't rebuild near it. Half a can should be more than enough.

"...irrational fear of wasps..."
No such thing, in my opinion; it's not irrational at all. I hate them too and am terrified. Allergic too. I always have some of the 20 foot spray around and I always RUN too!

The nest "was" half a basketball in size. The soaking from the wasp spray seemed to caused part of the nest to fall to the ground.

I checked yesterday and did not see any additional activity, but will probably spray it again tomorrow to get any of the stragglers.

The remaining nest is high up in the eave of the house next door, so not possible for me to knock it down even if I wanted to.

My neighbor works evenings (so is sleeping daytime) so she probably hasn't ever noticed the wasp nest.

Glad to know I am not alone in my strong "respect" of wasps!

Maybe they wont want to build there anymore (in the remaining nest)and go somewhere else. This weekend I just noticed a few tiny nests starting behind some wood trellises. I had seen a few wasps flying around that area. Then my son pointed out this large black garter snake with his head poking out of a shrub at about eye hieght. It gave me a scare until I realized it was harmless and that he was grabbing wasps out of the air! I wouldn't of believed it if I hadnt seen it lol.

Several years ago when we lived in Baltimore, we had yellow jackets invade our roof space. It was a 3 story townhouse so getting up to that level from the outside took a seriously tall ladder. We had a hard time finding a pest company to spray and it took them a couple tries before they successfully got rid of them. They estimated there were thousands and thousands of them up there. It got so bad that I could constantly hear them making that crunching, munching noise - crinkle up a regular piece of printer paper and you'll know exactly what it sounded like. Now imagine trying to sleep with that going on! I was terrified that they would come through the ceiling and I would suddenly be surrounded by swarms of the little things. It was not fun.